Retaining device.



A. a. SCHOENKY,

RETAINING DEVICE. AIIPLICATION FILED MAY 23' 1914.

Patented Apr. 25, 1916.

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- it properly serves -State of Massachusetts,

the shuttle box and is adapted to be spection, replaeement and repair.

I tofore known whereby,

- single handle or be both opened and shut, and

STATES PATENT oFFIo AUGUSTR. SCHOENKY, OF SOMERVILLE, MASSACHUSETTS, ASSIGNOR T0 REESE SHOE MACHINERY COMPANY; OF BOSTQN, MASSACHUSETTS, A. CORPORATION OF MAINE.

RETAINING nnvron.

Specification of'ltetter's Patent.

"Patented Apr. 25, 1916.

- Application filed May 23, 1914. Serial Nd. 840,482.

To all whom it may concern:

Be it known that 1, AUGUST R. Son'on'NKY, a citizen of the United States, residing at Somerville, in'the county ofMiddleseX and have invented oertain new and useful Improvements in Retaining. Devices, of which the following is specification, reference being had therein tothe accompanying drawing. This invention relates to retaining devices, and is herein illustrated for convenience as applied for the purpose of retaining the bobbin within the'shuttle of a lock stitch sewing machine, although obviously the invention might be employed for analogous purposes.

More especially this invention relates to the class. of retaining devices for sewing machine shuttles or bobbins involving an arm or retainer which is pivoted adjacent to swung betweenopen and closed positions, so that face of the shuttle during the operation 0 the machine and may-be opened when the machine is not operating, so as to permit in- An object of the present invention isto generally improve and simplify retaining kind referred. to and to pro devices of the vide an improved and simple means of normally'efiecting the locking of'the retainer in closed position. I Another object is to provide a novel and improved structure better than those here-' with the use of a operating device, the retainer may when shut may be both locked and unlocked, thus dispensing with the need of the operator employing both hands for opening or closing the retainer. I I Other objects hereof will. be elucidated "during the'hereinafter following descrip tion of the present invention.

To the attainment of the above recited ob- 'ects iiovel features 0 combination, construction, arrangement and detail referred to and illustrated in the accompanying description and drawings. 1 y I In the accompanying drawings forming a part hereof Figure l is a top plan view of an illustrative embodiment of the present to hold the bobbin in the f .blockedposition,

the present invention' consists in the invention showing it applied to the retaining of a'bobbin within a rotary shuttle, the retainerbeing in closed position. Fig. 2 1s a new similar to Fig. 1 with the retainer in open position. Fig. 3 is a front '60 elevation with the parts adjusted as in Fig.

.1. Fig. dis a horizontal section on plane 4+4. of Fig. a;

The present invention includes the novel combination with the retainer swingable between open and closed positions, of a brace whlch is eccentrically pivoted to the retainer, or, what is the same thing, to a part rigid with the retainer, together with a suitable means that is operative when the retainer is'closed and which serves to block the pivoted brace against endwise movement whereby the retainer is locked closed, but is able to be opened by displacing the brace.

The invention also includes th combination with such retainer, brace and blocking means, of a single handle which is adapted both to swing the brace into or out of the and, when the brace is out of blocked position, open or shut; "and specifically such handle is connected to the brace, and acts through the .brace for swinging the retainer.

Referring morespecifically to the drawings, a fixed portion 10 of the sewing machine frame supports the fixed shuttle box 11, in which rotates the circular shuttle 12 which the bobbin 13. The bobbin to swing the retainer has a vertical projection .14 provided for of two ways, namely, held against coming the purpose. of engaging with and being re- I the retainer 16 in either or both out of the shuttle and held through the prorotation. It will be 1mjection 14 against projection 14: and the rederstood that the cess in 15 have such thread or needlethread of the machine can be passed around the shuttle in forming each stitch so'as -to interlock with the shuttle thread provided by-the bobbin.

With the retainer relation that the under- 16 are comprised the following parts rigid therewith and substamtially a part thereof namely,..the vertical an offset or eccentric connection between w with the-retainer.

the retainer and the brace, to be hereinafter described. The parts 16. 17 and 18, being rigid, sing together. Their further details will be later described.

A novel and important element of the present invention is the brace 20 shown in the form of a strut or link, it being pivotally connected to the retainer at an eccentric point and adapted to swing, as will be herei-nafter described, into and out of its blocked position. Instead of connecting the brace 20 directly to the swinging arm portion of the retainer, it is shown pivoted at the top side of the crank disk 18, which is rigid Such a pivotal connection is conveniently afforded by an upwardly projecting crank pin or stud 21 formed in tegral with the disk 18 and surrounded by the hub portion at the left end of the brace 20. The free or swinging end 22 of the brace is the part thereof which is adapted to beblocked to preclude opening movement ofithe retainer when closed. For this purpose the end 22 may be in the form of a hub as at the left, so that the brace constitutes a sort of link between the offset crank pin 21 and the blocking means.

Referring to Fig. 1, it is obvious that,

"if the brace or link 20 can be held or blocked against movement when the retainer is closed, such action will effect the locking of the retainer. While the relative arrangement of the parts might be considerably altered, the crank pin 21in Fig. 1 is shown located to the rear of the/fulcrum shaft 17, forming the axis of swinging of the retainer, and the brace 20 in this figure extends directly to the right. If now the righthand end 22 of the brace be held so as to prevent endwise movement of the brace, this will render the crank pin 21 absolutely immovable, so that the retainer becomes securely locked. The following constitutes a' convenient blocking means acting at the free end 22 of the brace to prevent endwise movement of the brace.

A blocking arm 24 is shown pivoted at its le t at 25, and its rightdiand end 26 is pivotally connected to the right-hand end 22of the brace. The parts are so arranged, designed and proportioned that the effective direction or axis of the-brace and thatof the blocking arm coincide in Fig. 1. In this way the parts are in efi'ect put upon a dead center, and the blocking arm effectually recludes endwise movement of the brace and, therefore, any movement of the crank pin and retainer. On the other hand, one

5 merely has to swing the free ends 22 and 26 and arm forwardly to throw the parts off dead center and permit or cause the opening of the retainer.

The connection between the swinging ends 22 and 26 and arm is shown in the form of a vertical fulcrum stud 28. and this conveniently formsa support for a handle 29 by which the swinging of the brace and arm may be etl'ected.

By the described arrangement it will be seenthat the brace 20 not only forms a i causes the retainer to swing closed and thereafter, upon reaching dead center, blocks the brace and therefore locks the retainer shut. The described combination, therefore, attains the chief advantages hcreinbefore recited.

Certain matters of preferred detail will now be described. In order to assist the operator to bring the parts accurately to dead center without going beyond such position, there may be provided a yielding device or pin 32 indicating when the proper adjustment is attained. This yielding pin .or stop may be variously arranged, but is shown as coiiperating with the underside of the blockingarm 24;, which is properly constructed for the'purpose. The pin 32 is vertically slidable through a screw cap 33, which retains it in position and also retains a helical spring 34 tending al.-

ways to raise the pin. These parts for the blocking arm is provided with a sink or recess 35 directly above the stop pin 32 when the parts are in closed position. The blocking arm isalso formed with an inclined approach or recess at 36 assisting the operatorin forcing the blocking arm into posi- -tion. As seen in Fig. 3, the top of the pin 32 is rounded and the recess 35 is conical, so that, while the parts are sufiicientl'y held, they may be disengaged by a quick forward pull upon the handle 29. Thus, the operator may unblock the brace and swing open the retainer by a forward movement of the handle, and by a. rearwagd movement close wer lock the brace, thereby locking ,the retainer;

.It will be understood that when the parts -igIyare in the position of Figs. 1 andv 3,.the reftalneris locked inclosed position. The ex-.

-1ict position of the endor head of the retainer arm .i's" ofs'ome importance,.and, in order to accuratelyposition it when the :10 partsare locked, the following convenient retainer arm at the point where it is rigidly connected to the'fulcru m shaft 17 may be formed in two parts, namely, the lower and left-hand part 39,-which is directly keyed to'the'.fulcrumshaft, and the part 40 from which-the swinging arm actually; extends. An adjusting screw 41 between-the parts 39 and tO permits slight relative adjustment between them, so that the arm may be in,- itially accurately positioned.v A look nut 42 serves to lock the adjusting -screw'etl against accidental displacement.

'Incase it-is'd'esirable to limit theopening or outward lswin'ging of the retainer, for example, to] the s'ition shown in Fig. 2, such limitatio in vibe effected by providing upontheportion 39 a stop 455 ,which, when tl ainer is swung open, ,"comes'i'nto centa w'ith a fixed stop or lug 46, formed ,bene'ath seen in Fig. 2."

i ,5. The; complete operation of the device will.

be readily understood from the above de- 3 5.scripti 1l11.... j i U I. '.Tl1( "gi'n'al' adjustment of the device is simple husj, the operator will adjust themeinb '0' and'24 to their dead center po- "sition s hownin- Figs. 11 and 3, and. there- 7 upon, .w'iththe lo'ckfnuts 19 and 42 loose,

;will adjust the screw 41 until the he'ad1'5 of the retainerstands in precisely correct There os'ition h respect to the shuttle. fiiponthe lo elinut 42 will be tightened to 4.5; secure the screw 41, and lastly the nut 19 (will be tightened to hold the retainer in grigid relation to the fulcrum shaft 17.

It will thus be seen that a retaining device has been described accomplishing the objects and attaining the advantages hereinbefore referred to, and other advantages 'will be apparent tothose skilled in the art. Since many matters of 'form, combination, arrangement, design and detail may be variously .modifiedwithout departing from the principles hereof, no limitations to such features are intended excepting so far as specified in the appended claims; )What is claimed is: I

L Retaining means for'sewing machine 'shl' ittlesl-or the like comprising, in combination with a' retainer swingable between closedand-open positions, a brace movably} mounted at an eccentric pointupon, so as J Hi-swing with the. retainer gnmto perrnig means maybe employed. The

the frame parts 10, as:

. the blocking of the brace.

shifting thereof relatively to the retainer,

I and a blocking member adapted to block the brace when the retainer isclosed andthereby prevent opening of the closed retainer.

2. Retaining means forsewing' machine 79 shuttles or the like comprising, in combination with a retainer swingable between closed and open positions, a'brace eccentrically mounted upon the retainer in a manner to permit relative,;shifting thereof, and a blocking member adapted to block the brace and thereby prevent opening of the closed retainer; said threeelements so constructed and combined that a single shifting of the brace unblocks the brace and then opens the 80 retainer, while a reverse shifting closes the retainer and then blocks the brace; I

Retaining -means for sewing machineshuttles or the like comprising, in combination with a retainer s'wingable between closed and open positions, a brace pivoted at an eccentric pointupon, so as to swing witlr'the retainer, and a blocking member. said elements so constructed and-combinedthat when the, retainer is closed the brace 9Q may be swunginto position'tobe blocked by sald member against endwise movement,

hereby locking the retainer closed.

I ls-Retaining means for sewing machine shuttles or the like comprising in combin'ation with a retainer swingable between closed andopen positions, a brace pivoted at an ecblocks the brace and thereuponopens the retainer. I I I I 5. Retaining means for sewing machineshuttles or the like comprising in combination with a retainer swingable between closed and open positions, a brace pivoted a an eccentrlc point upon the retalner, and

blocking member; said elementsso constructed and combined that when the retainer is closed, the brace may be swung into position to be blocked'by said member against endw'ise movement, thereby locking the retainer closed; and a control handle connected so that one operative movement thereof untainer, the reverse movement acting through the brace to close the retainer followed by 6, Retaining means for sewing machine shuttles or the like comprising in combina-.,"

with a retainer .swingable between I I d and open positions, a brace mounted a an eccentric point upon the retainer t'o pa ms a limited relative swinging-- hmov I mentthereof, and a brace-blocking mem said elements combined so that when the retainer is closed the brace may be swung into and out of blocked position, and when the brace is out of blocked position the brace may open and closethe retainer. 4

7. Retaining means for sewing machine shuttles orthe like comprising in combina tion with a retainer ,swingable between closed and open positions, a brace mounted at an eccentric point upon the retainer to permit a limited relative swingingmovement thereof, and a braceblocking member, said elementscombined so that when the retainer is closed the brace may be swung into and out of blocked position, and when the brace out-of blocked position the brace may open and closethe retainer, and a handlefor shifting the brace in either direction wherea the brace is swung into blockedposition.

9. A retaining device for the described or analogous purposes, comprising in combination, a retainer fitted to swing between closed and open positions, a link .pivotally connected to the retainer at an eccentric pomt, and

adapted to swing into and from blocked position, anda blocking arm pivotally mounted and having its free end pivotallyengaged with the free end of said link, the parts so arranged and related that when the retainer is closed the link and the arm may be moved to dead center to block the link against endwise movement and thereby lockthe retainer closed."

10. A retaining device for the*descril ied or analogous purposes, comprising in combination, a pivoted retainer having a crank swinging therewith, an arm pivoted at a point eccentric to said retainer, and a link connecting said crank and arm, wherel when the arm and link are in alinement the retainer is locked, and displacement of link or arm causes swinging oi the retainer:

11. A retaining device for the described or analogous purposes, comprising in combi nation, a pivoted retainer having a crank swinging therewith, an arm pivoted at a point eccentric to said retainer, anda link ,connecting said crank and arm, wvhcroby when the arm and link are in alincmcnt the retalner is locked, and displacenicntof link or arm causes swinging of the retainer. a

handle adapted to swing the link and arm into and out of alinement, and means for yieldingly retaining them in alinement.

' In testimonywhereof'l aflix my signature in presence of two witnesses.

, AUGUST R. SCHOENKY.

Witnesses: i i a F. D. GADY,

lliinnrx Nrcnots. 

